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Research & Development Got a well-founded knack with ROM hacking? Love reverse-engineering the Pokémon games? Or perhaps you love your assembly language. This is the spot for polling and gathering your ideas, and then implementing them! Share your hypothesis, get ideas from others, and collaborate to create!
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  #1    
Old February 3rd, 2010 (02:36 PM). Edited April 19th, 2010 by HackMew.
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Brief Intro


Here I've got a couple of routines for you. They are designed to get the minimum and maximum levels respectively.

Description


As you can see, the routines are pretty short and simple so I did not comment them on purpose.
Either way, here's a brief description of what happens:
  1. Get the Pokémon party level address into r1.
  2. Load the first value into r0, and assume it's the minimum (or maximum) value yet.
  3. Loop 5 times, and update the mininum (or maximum) value if needed.
  4. Get the LASTRESULT var address into r1 and store the minimum (or maximum) level.
The minimum routine, however, is slighty different because a zero-level is not an acceptable value so there's an extra check to take that into account (otherwhise as long as your team is not full, the minimum level would always be zero, which is no good obviously). That also means the routine will loop up to 5 times rather than always 5 as it happens in the maximum routine.

The Code


GetMinPartyLevel


  • FireRed/LeafGreen

    Code:
    .text .align 2 .thumb .thumb_func .global GetMinPartyLevel main: push {r0-r3, lr} ldr r1, .PARTY_LVL ldrb r0, [r1] mov r3, #0x5 loop: add r1, #0x64 ldrb r2, [r1] cmp r2, #0x0 beq return cmp r2, r0 bge next add r0, r2, #0x0 next: sub r3, #0x1 cmp r3, #0x0 bne loop return: ldr r1, .VAR strh r0, [r1] pop {r0-r3, pc} .align 2 .PARTY_LVL: .word 0x02024284 + 0x54 .VAR: .word 0x020270B6 + (0x800D * 2)
  • Ruby/Sapphire

    Note: The routine is the same as the FR/LG one; just replace the bottom part with the following:

    Code:
    .align 2 .PARTY_LVL: .word 0x03004360 + 0x54 .VAR: .word 0x0201E8C2 + (0x800D * 2)
  • Emerald

    Note: The routine is the same as the FR/LG one; just replace the bottom part with the following:

    Code:
    .align 2 .PARTY_LVL: .word 0x020244EC + 0x54 .VAR: .word 0x020275D6 + (0x800D * 2)

GetMaxPartyLevel


  • FireRed/LeafGreen

    Code:
    .text .align 2 .thumb .thumb_func .global GetMaxPartyLevel main: push {r0-r3, lr} ldr r1, .PARTY_LVL ldrb r0, [r1] mov r3, #0x5 loop: add r1, #0x64 ldrb r2, [r1] cmp r2, r0 ble next add r0, r2, #0x0 next: sub r3, #0x1 cmp r3, #0x0 bne loop return: ldr r1, .VAR strh r0, [r1] pop {r0-r3, pc} .align 2 .PARTY_LVL: .word 0x02024284 + 0x54 .VAR: .word 0x020270B6 + (0x800D * 2)
  • Ruby/Sapphire

    Note: The routine is the same as the FR/LG one; just replace the bottom part with the following:

    Code:
    .align 2 .PARTY_LVL: .word 0x03004360 + 0x54 .VAR: .word 0x0201E8C2 + (0x800D * 2)
  • Emerald

    Note: The routine is the same as the FR/LG one; just replace the bottom part with the following:

    Code:
    .align 2 .PARTY_LVL: .word 0x020244EC + 0x54 .VAR: .word 0x020275D6 + (0x800D * 2)

This research document is Copyright © 2010 by HackMew.
You are not allowed to copy, modify or distribute it without permission.
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  #2    
Old February 4th, 2010 (04:33 AM).
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Wow, this routine unlocks some pretty cool stuff, such as a FR/LG Battle Frontier-style thing (the opponents' Pokémon are the same level as your max Pokémon, for example). It's real cool. Nice one, HackMew!
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Old February 4th, 2010 (09:09 AM).
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don't mean to put ya down, but couldn't this be done with a script as well?
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  #4    
Old February 4th, 2010 (09:43 AM).
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Quote:
Originally Posted by The Master View Post
Wow, this routine unlocks some pretty cool stuff, such as a FR/LG Battle Frontier-style thing (the opponents' Pokémon are the same level as your max Pokémon, for example). It's real cool. Nice one, HackMew!
You're welcome :)


Quote:
Originally Posted by 0m3GA ARS3NAL View Post
don't mean to put ya down, but couldn't this be done with a script as well?
As far as I know, there's no special that can do that. Feel free to prove me wrong.
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  #5    
Old February 4th, 2010 (10:22 AM).
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No specials really it would just be a long script I suppose... Probably much more space-efficient to use your routine... (A script version would require tons of copybyte's and comparefarbytes' as well as knowing RAM locations of variables, it's better to just use your routine and call it with callasm...)
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Greetings Warden
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>Display User_Info
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Username:
0m3GA ARS3NAL
Age: 18
Sex: Male ♂
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Quote:
"What is this
I don't even..."

M/O: Often acts out to get attention, but recently has changed that. Has been studying up on hacking information and hopes to participate in more advanced hacking discussion.
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  #6    
Old February 4th, 2010 (12:14 PM).
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Quote:
Originally Posted by 0m3GA ARS3NAL View Post
No specials really it would just be a long script I suppose... Probably much more space-efficient to use your routine... (A script version would require tons of copybyte's and comparefarbytes' as well as knowing RAM locations of variables, it's better to just use your routine and call it with callasm...)
Yeah, indeed. Those routines are definitely more space- and time-efficient then any scripting equivalents.
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  #7    
Old February 7th, 2010 (06:28 AM).
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Nice routine. I'll definitely be using this in the long run, thanks a lot!
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Old May 16th, 2010 (06:51 PM).
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*Big big Bump*

Wow. This is so cool!
I could use this for my hack

And yeah, it takes less space (about 28 bytes in hex?) than the longer script version.
SO cool.
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